NUMERICAL SIMULATION OF TWO-PHASE FLOW WITHIN AN EFFERVESCENT ATOMIZER USING VOLUME OF FLUID MODEL

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ALIZADEH KAKLAR ZAHRA; ANSARI MOHAMAD REZA

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Journal: Modares Mechanical Engineering Year:2017 | Volume:17 | Issue:7 Page(s): 59-67

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Title

NUMERICAL SIMULATION OF TWO-PHASE FLOW WITHIN AN EFFERVESCENT ATOMIZER USING VOLUME OF FLUID MODEL

Author(s)

ALIZADEH KAKLAR ZAHRA | ANSARI MOHAMAD REZA | Issue Writer Certificate

Keywords

EFFERVESCENT ATOMIZERQ1

GAS-LIQUID TWO PHASE FLOWQ1

VOLUME OF FLUID MODELQ1

GAS-TO-LIQUID MASS RATIOQ1

Abstract

In the present study two-phase flow within the EFFERVESCENT ATOMIZER has been simulated by the volume of fluid interface tracing model using 0.08%, 0.32%, 1.24%, and 4.9% GAS-TO-LIQUID MASS RATIOs and 0.38 L/min liquid flow rate. The purpose of this simulation is to study two-phase flow regimes within the EFFERVESCENT ATOMIZER and their effect on the atomization quality. This study also considers the gasliquid interface instabilities in different two-phase flow regimes inside the atomizer. The compressibility of gas phase, which is not considered in previous researches, is included in this study with the GAS-TO-LIQUID MASS RATIOs of 1.24% and 4.9%, due to the high gas phase velocity in constant liquid flow rate and high GAS-TO-LIQUID MASS RATIOs. The effect of gravitational force is considered in all simulations. The results of the simulation indicate that by increasing the GAS-TO-LIQUID MASS RATIO, the two-phase flow regime inside the discharge passage transfers from bubbly flow regime with long bubbles to annular flow regime. In addition to decreasing the liquid film thickness coming out from discharge orifice (during transform of the flow regime from bubbly flow to annular flow), the liquid interface instabilities increase in the annular flow regime and segregated ligaments from the liquid interface become shorter, thinner and more unstable. This type of regime is the most efficient flow behavior for the EFFERVESCENT ATOMIZER.

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APA: Copy

ALIZADEH KAKLAR, ZAHRA, & ANSARI, MOHAMAD REZA. (2017). NUMERICAL SIMULATION OF TWO-PHASE FLOW WITHIN AN EFFERVESCENT ATOMIZER USING VOLUME OF FLUID MODEL. MODARES MECHANICAL ENGINEERING, 17(7 ), 59-67. SID. https://sid.ir/paper/179344/en

Vancouver: Copy

ALIZADEH KAKLAR ZAHRA, ANSARI MOHAMAD REZA. NUMERICAL SIMULATION OF TWO-PHASE FLOW WITHIN AN EFFERVESCENT ATOMIZER USING VOLUME OF FLUID MODEL. MODARES MECHANICAL ENGINEERING[Internet]. 2017;17(7 ):59-67. Available from: https://sid.ir/paper/179344/en

IEEE: Copy

ZAHRA ALIZADEH KAKLAR, and MOHAMAD REZA ANSARI, “NUMERICAL SIMULATION OF TWO-PHASE FLOW WITHIN AN EFFERVESCENT ATOMIZER USING VOLUME OF FLUID MODEL,” MODARES MECHANICAL ENGINEERING, vol. 17, no. 7 , pp. 59–67, 2017, [Online]. Available: https://sid.ir/paper/179344/en

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